of a population can consist of maternal females with egg sacs in these later months. There is a variation in morph frequencies between mature and immature T. grallator individuals. Mature spiders do not contain the black or maroon patterns that are observed in spiderlings. In addition, the Red blob morph, characterized by red pigment covering the entire abdomen, has a much higher frequency in adult T. grallator. Therefore, it can be inferred that maroon and black patterns in spiderlings develop into the Red blob morph patterns once they mature into adults. Mating Female/male interactions Mature males actively move through forest vegetation seeking out females, which tend to be more sedentary. Courtship depends primarily on vibrations and olfaction. For example, males may carry out a courtship dance that involves somatic movements and web-plucking. These vibrations during the courting performance are assessed by potential female mates. Copulation occurs at night, while both spiders hang from the underside of the leaf. Males die soon after mating, but females live longer, and guard their eggs until they hatch, catching prey for their young. In addition, a rare-male advantage phenomenon during mating has been observed. Females may prefer a rarer male morph for many reasons. For example, a less common morph may better evade predation. This rare morph may then be selected for and will increase in number until it no longer provides the inconspicuous advantage from predators – an example of apostatic selection, which is a type of negative frequency-dependent selection. The advantage will be eliminated when predators begin to recognize this rarer pattern and thus will begin to target these patterned morphs. This phenomenon of the rare-male mating advantage may act more strongly on reproductive males than females because males are much more mobile during reproductive season. In addition, T. grallator belongs to a family of spiders with very low levels of visual acuity. Thus, female spiders' preference for males with these rarer patterned morphs is not attributed to physical attractiveness but instead to this advantage from predators. In fact, due to their poor vision, males court females using vibratory and olfactory signals. Parental care Egg guarding A maternal female T. grallator is notably aggressive against intruders right after the hatching of her young, while she is guarding her egg sac. She must protect her young from predation, parasitic wasps, and the possibility of the resident leaf dropping. Once the spiderlings have hatched,